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Regular Expressions

 
AnswerRe: [Solved] Pin
Kenneth Haugland20-Mar-14 20:55
mvaKenneth Haugland20-Mar-14 20:55 
GeneralRe: [Solved] Pin
PIEBALDconsult25-Mar-14 12:30
mvePIEBALDconsult25-Mar-14 12:30 
QuestionMATLAB Code Pin
Member 1068110218-Mar-14 19:02
Member 1068110218-Mar-14 19:02 
QuestionRe: MATLAB Code Pin
Richard Deeming19-Mar-14 2:04
mveRichard Deeming19-Mar-14 2:04 
AnswerRe: MATLAB Code Pin
Kornfeld Eliyahu Peter19-Mar-14 5:00
professionalKornfeld Eliyahu Peter19-Mar-14 5:00 
QuestionParsing ASCII-Only string Pin
Marco Bertschi6-Feb-14 22:54
protectorMarco Bertschi6-Feb-14 22:54 
AnswerRe: Parsing ASCII-Only string Pin
Richard Deeming7-Feb-14 1:36
mveRichard Deeming7-Feb-14 1:36 
GeneralRe: Parsing ASCII-Only string Pin
Marco Bertschi7-Feb-14 1:50
protectorMarco Bertschi7-Feb-14 1:50 
Richard,

thank you very much for your answer. I have developed the Regex a bit further, so it parses only matching strings, causing an InvalidOperationException in case the string contains any invalid characters. This behavior makes sense, since a hostname with removed characters may cause confusion.
I have also added a length maximum of 255 characters, and the string must have at least a single character.

C#
Regex regex = new Regex(@"(^[\40-\176]{1,254}$)");//Printable ASCII characters only
Match match = regex.Match(value);
if (match.Groups.Count == 2)
{
    host = match.Groups[1].Value;
}
else
{
    throw new InvalidOperationException(string.Format("The string {0} for host is misformatted. It may only contain printable US-ASCII characters.", value));
}


I am not fully convinced by your idea of iterating through the string - The RegEx makes the code easier to read, and easier to change if someone suddenly requires to allow special characters. In Addition to that, I fear a performance loss when iterating through the string.
Clean-up crew needed, grammar spill... - Nagy Vilmos

GeneralRe: Parsing ASCII-Only string Pin
Richard Deeming7-Feb-14 2:04
mveRichard Deeming7-Feb-14 2:04 
QuestionRe: Parsing ASCII-Only string Pin
Marco Bertschi7-Feb-14 2:08
protectorMarco Bertschi7-Feb-14 2:08 
AnswerRe: Parsing ASCII-Only string Pin
Richard Deeming7-Feb-14 2:14
mveRichard Deeming7-Feb-14 2:14 
GeneralRe: Parsing ASCII-Only string Pin
Marco Bertschi7-Feb-14 2:33
protectorMarco Bertschi7-Feb-14 2:33 
QuestionParsing a string with match groups Pin
Dominick Marciano23-Aug-13 9:47
professionalDominick Marciano23-Aug-13 9:47 
AnswerRe: Parsing a string with match groups Pin
Matt T Heffron28-Oct-13 11:33
professionalMatt T Heffron28-Oct-13 11:33 
AnswerRe: Parsing a string with match groups Pin
Gabriel Szabo7-Nov-13 21:27
Gabriel Szabo7-Nov-13 21:27 
QuestionMatching a string. Pin
Septimus Hedgehog19-Aug-13 4:48
Septimus Hedgehog19-Aug-13 4:48 
AnswerRe: Matching a string. Pin
PIEBALDconsult19-Aug-13 5:03
mvePIEBALDconsult19-Aug-13 5:03 
GeneralRe: Matching a string. Pin
Septimus Hedgehog19-Aug-13 5:27
Septimus Hedgehog19-Aug-13 5:27 
GeneralRe: Matching a string. Pin
PIEBALDconsult19-Aug-13 5:31
mvePIEBALDconsult19-Aug-13 5:31 
GeneralRe: Matching a string. Pin
Septimus Hedgehog19-Aug-13 5:44
Septimus Hedgehog19-Aug-13 5:44 
GeneralRe: Matching a string. Pin
PIEBALDconsult19-Aug-13 9:01
mvePIEBALDconsult19-Aug-13 9:01 
GeneralRe: Matching a string. Pin
Septimus Hedgehog19-Aug-13 23:04
Septimus Hedgehog19-Aug-13 23:04 
QuestionHelp wanted with regex format. Pin
Septimus Hedgehog31-Jul-13 3:17
Septimus Hedgehog31-Jul-13 3:17 
AnswerRe: Help wanted with regex format. Pin
Richard Deeming31-Jul-13 3:47
mveRichard Deeming31-Jul-13 3:47 
GeneralRe: Help wanted with regex format. Pin
Septimus Hedgehog31-Jul-13 3:53
Septimus Hedgehog31-Jul-13 3:53 

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